Textile assistants



Patented Mar. 7, 1939 PATENT OFFICE TEXTILE ASSISTANTS Herbert Rein, Lcipsig,

Germany, auignor to I. G.

Farbeninduatrie Aktiengesellschaft, Frankforton-the-Main, Germany No Drawing.

Application Maya, 1930, Serial No.

In Germany May '1 Claims. (01. 28-1) This invention relates to a new kind of assistants for the textile industry.

It is an object of the invention to provide a new class of textile assistants, such as wetting-. softeningand emulsifying agents. having improved properties.

A further object is a new process of softening textile fibers of animal and vegetable origin.

Further objects will become apparent as the following description proceeds.

According to this invention it has been found that compounds of the general formula:

which are called biguanides, particularly such as p contain in at least one of the radicals R1 and Rs a straight, branched or cyclic chain of more than I 6 carbon atoms, have a wide application as wetting and emulsifying agents, as protective colloids or the like, as textile assistants and as auxiliaries in other branches of industry. R1 and B: may be, for instance, decylamine, octadecylamine, benzylamine, oleylamine, isopropyldodecylamine, dodecylamine stearylor cyclohexylamine.

The compounds are made, for instance, by the action of dicyandiamide on the salt of a primary or secondary aliphatic, aromatic or hydroaromatic amine at a raised temperature. The start--v ing materials may be boiled in an aqueous alcoholic solution or they may be melted together at a temperature say between 120 and 160 C. In many cases it is not necessary to isolate the compounds, since the products of reaction may be used directly in a crude condition.

The following examples illustrate the invention:

Example 1.Artiflcial silk in 'skeins is brightened by means of a warm solution containing 5 grams of octodecylbiguanlde per liter. The grip of the silk is softened and becomes more fluid and the working up of the silk is improved.

Example 2.-2 parts ofcastor oil and 1 part of laurylbiguanide are stirred in a stirring or heating apparatus to produce a homogeneous mixture. 0n diluting with water there is obtained a stable highly dispersed emulsion which may be used for lubricating, softening and the like purposes.

Example 3.-Raw, still sized cotton shirtings which cannot be wetted with hot water are immediately thoroughly wetted in a bath to which 2 55 grams of isopropyldodecylbiguanide have been added, whereby the successive operations, such as de-sizing and the like, can be carried out with an essentially better result and with enhanced certainty.

Example 4.-1.1 molecular proportions of dicyandiamide are melted with one molecular proportion of stearylarnine hydrochloride in an oil bath at to C. for 6 to 8 hours while stirring. There is produced a brownish thickly liquid mass which, when introduced into water, yields a strongly foaming solution and can be used as such in hot condition.

Example 5.-1.1 molecular proportions of dicyandiamide are melted with 1 molecular proportion of dodecylmethylamine hydrochloride as described in the preceding example, whereby dodecylmethyl-biguanide is produced.

Example 6.-85 grams of dicyandiamide are boiled with 290 grams of dodecylamine hydrochloride in methanolic solution for 12 hours under reflux. After distillation of the alcohol there is obtained a mass which has the appearance of soft soap, consists mainly of dodecyl-biguanide and shows a strong biuret reaction.

Example 7.-132 grams of diethylenediamine hydrochloride are boiled with grams of dicyandiamide in methanolic solution for 12 hours under reflux and worked up as described in the preceding example. This compound is particularly useful as a wetting agent.

Example 8.1 molecular proportion of benzylamine hydrochloride is boiled with 1 molecular proportion of dicyandiamide in methanolic solution for 12 hours, whereby benzyl-biguanide is produced. I

Example 9.-1 molecular proportion of hexahydroaniline hydrochloride and 1 molecular proportion of dicyandiamide are boiled in methanolic solution as described above, whereby cyclohexylbiguanide is produced.

What I claim is:

l. A textile material impregnated with octadecyl-biguanide.

2. A textile material impregnated with dodecylmethyl-biguanide.

3; A textile material impregnated with a compound corresponding with the general formula wherein R1 is a member of the group consisting oi? hydrogen, aliphatic, araliphatic, aromatic, hydroaromatlc radicals; audit: is a member of the group consisting of aliphatlc, a.raliphatic and hydroaromatic radicals containing more than 6 carbon atoms.

4. In a process of softening textile materials the improvement which comprises impregnating said textile materials with a compound of the following general formula whereinm isa memberotthe groupcoulisting oi hydrogen, aliphatic. araliphatic. aromaflc, h!- droaromatic radicals; and R: is a membdr'ot the group consisting of aliphatic, araliphatic and bydroaromatic radicals containing more than H carbon atoms. a

5. In a process of softening textile materials the improvement which comprises impregnating said textile materials with stearylbiguanide.

6. In a process of softening textile materials the improvement which comprises impregnating said textile materials with dodecylmethylbiguanide.

'7. In a process 0! soitening textile materials the improvement which comprises impregnating said textile materials with cyclohexylbiguanide HERBERT REIN- 

